Ceramics based on aluminum titanate, process for their production and their use

US5288672A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ernst Gugel · Hessisch Oldendorf, DE
• Bernhard Freudenberg · Coburg, DE
• Johannes Seyer · Hessisch Oldendorf, DE

Key dates

• Filing date: Jun 15, 1992
• Grant date: Feb 22, 1994
• Expiry date: Jun 15, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B35/478
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Ceramics having principal phases of aluminum iron titanate and mullite corresponding to the overall chemical composition: PA0 50 to 62% by weight Al.sub.2 O.sub.3, PA0 36 to 49.5% by weight titanium oxide, expressed as TiO.sub.2, PA0 0.5 to 10% by weight SiO.sub.2, and PA0 0.2 to 15% by weight iron oxide, expressed as Fe.sub.2 O.sub.3, PA0 up to 1% by weight impurities, PA0 with the sum of Al.sub.2 O.sub.3, TiO.sub.2 and SiO.sub.2 being 100%, wherein the sum of the crystalline phases Al.sub.2 O.sub.3, TiO.sub.2, SiO.sub.2 (other than the principal phases) is less than 6% by weight, based on the sintered body, are useful where a ceramic having a high thermal-shock-resistance is required, such as exhaust port liner internal combustion engines, for example.